<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>立方体</title>
    <link rel="stylesheet" href="css/立方体.css">
</head>
<body>
    <div class="con">
        <div class="cube">
            <div class="side front">1</div>
            <div class="side left">2</div>
            <div class="side right">3</div>
            <div class="side back">4</div>
            <div class="side top">5</div>
            <div class="side bottom">6</div>
        </div>
    </div>
</body>
</html>